Grafana+Prometheus监控服务器
环境：Centos7，Supervisor持久化运行
下载以及安装Grafana，需要放通3000端口用于Grafana的网页后台控制。（IP:3000）
wget https://dl.grafana.com/oss/release/grafana-8.0.3-1.x86_64.rpm
sudo yum install grafana-8.0.3-1.x86_64.rpm用.deb或.rpm安装完成之后可以用systemd或init.d控制。
sudo systemctl daemon-reload
sudo systemctl start grafana-server
sudo systemctl status grafana-server登入后台，默认用户名密码admin，首次登录会被要求强制修改密码。
安装Prometheus，找到最新版，截至目前是2.28.0 https://github.com/prometheus/prometheus/releases/ （外网访问需要放通9090端口）
wget https://github.com/prometheus/prometheus/releases/download/v2.28.0-rc.0/prometheus-2.28.0-rc.0.linux-amd64.tar.gz
tar -xzvf prometheus-2.28.0-rc.0.linux-amd64.tar.gz
cd prometheus-2.28.0-rc.0.linux-amd64编辑prometheus.yml文件，官方默认配置文件如下，默认监控Prometheus自身。
# my global config
global:
scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
# scrape_timeout is set to the global default (10s).
# Alertmanager configuration
alerting:
alertmanagers:
- static_configs:
- targets:
# - alertmanager:9093
# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
# - "first_rules.yml"
# - "second_rules.yml"
# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
# The job name is added as a label `job=` to any timeseries scraped from this config.
- job_name: 'prometheus'
# metrics_path defaults to '/metrics'
# scheme defaults to 'http'.
static_configs:
- targets: ['localhost:9090']#全局时间间隔
scrape_interval: 15s
#规则扫描时间间隔
evaluation_interval: 15s
#超时时间
scrape_timeout: 5s更详细的可以参考官方文档：https://prometheus.io/docs/prometheus/latest/configuration/configuration/
./prometheus网页后台：IP:9090可以看到自身的状态是UP。
node_exporter就是获取宿主机的资源信息，CPU占用，内存占用等
安装node_exporter，找到最新版，截至目前是1.1.2 https://github.com/prometheus/node_exporter/releases/ （外网访问需要放通9100端口）
wget https://github.com/prometheus/node_exporter/releases/download/v1.1.2/node_exporter-1.1.2.linux-amd64.tar.gz
tar -xzvf node_exporter-1.1.2.linux-amd64.tar.gz
cd node_exporter-1.1.2.linux-amd64
./node_exporterPrometheus创建job获取node_exporter的数据，job_name可以随便取。修改yml文件一定要严格注意格式（缩进）。
- job_name: 'exporter'
static_configs:
- targets: ['localhost:9100']然后重启Prometheus，网页后台可以看到这个job上线了。
重新回到Grafana网页后台，可以自己创建Dashboard，也可以用现成的。进入官方库：https://grafana.com/grafana/dashboards
也可以用这个：https://grafana.com/grafana/dashboards/8919
复制数字，回到后台，点左侧加号然后Import，输入数字ID点Load，VictoriaMetrics选择Prometheus，最后Import即可。
最终效果可以观看我的：https://status.elstec.cn/d/fcJIWBR7z/jcjyxjs?orgId=1
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